Operation Manual

Vigor120 Series User’s Guide
8
Now, you have to select an appropriate WAN connection type for connecting to the Internet
through this modem according to the settings that your ISP provided.
VPI Stands for Virtual Path Identifier. It is an 8-bit header inside
each ATM cell that indicates where the cell should be routed. The
ATM, is a method of sending data in small packets of fixed sizes.
It is used for transferring data to client computers.
VCI Stands for Virtual Channel Identifier. It is a 16-bit field inside
ATM cell’s header that indicates the cell’s next destination as it
travels through the network. A virtual channel is a logical
connection between two end devices on the network.
Protocol/Encapsulation Select an IP mode for this WAN interface. There are several
available modes for Internet access such as PPPoE, PPPoA,
Bridged IP and Routed IP.
Fixed IP Click Yes to specify a fixed IP for the modem. Otherwise, click
No (Dynamic IP) to allow the modem choosing a dynamic IP. If
you choose No, the following IP Address, Subnet Mask and
Default Gateway will not be changed.
IP Address Assign an IP address for the protocol that you select.
Subnet Mask Assign a subnet mask value for the protocol of Routed IP and
Bridged IP.
Default Gateway Assign an IP address to the gateway for the protocol of Routed
IP and Bridged IP.
Primary DNS Assign an IP address to the primary DNS.